/* Copyright (c) 2022-2022, LiWangQian<liwangqian@huawei.com> All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef LIBSIM_COMPARABLE_H_INCLUDED
#define LIBSIM_COMPARABLE_H_INCLUDED

namespace libsim {

template <typename X, typename Y>
class comparable {
public:
    friend constexpr bool operator==(const X &x, const Y &y) noexcept
    {
        return x.compara(y) == 0;
    }

    friend constexpr bool operator!=(const X &x, const Y &y) noexcept
    {
        return x.compara(y) != 0;
    }

    friend constexpr bool operator<(const X &x, const Y &y) noexcept
    {
        return x.compara(y) < 0;
    }

    friend constexpr bool operator>(const X &x, const Y &y) noexcept
    {
        return x.compara(y) > 0;
    }

    friend constexpr bool operator<=(const X &x, const Y &y) noexcept
    {
        return x.compara(y) <= 0;
    }

    friend constexpr bool operator>=(const X &x, const Y &y) noexcept
    {
        return x.compara(y) >= 0;
    }

    ////////////////////////////////////////////////////////////////

    friend constexpr bool operator==(const Y &y, const X &x) noexcept
    {
        return x == y;
    }

    friend constexpr bool operator!=(const Y &y, const X &x) noexcept
    {
        return x != y;
    }

    friend constexpr bool operator<(const Y &y, const X &x) noexcept
    {
        return x > y;
    }

    friend constexpr bool operator>(const Y &y, const X &x) noexcept
    {
        return x < y;
    }

    friend constexpr bool operator<=(const Y &y, const X &x) noexcept
    {
        return x >= y;
    }

    friend constexpr bool operator>=(const Y &y, const X &x) noexcept
    {
        return x <= y;
    }
};

template <typename X>
class comparable<X, X> {
public:
    friend constexpr bool operator==(const X &x, const X &y) noexcept
    {
        return x.compara(y) == 0;
    }

    friend constexpr bool operator!=(const X &x, const X &y) noexcept
    {
        return x.compara(y) != 0;
    }

    friend constexpr bool operator<(const X &x, const X &y) noexcept
    {
        return x.compara(y) < 0;
    }

    friend constexpr bool operator>(const X &x, const X &y) noexcept
    {
        return x.compara(y) > 0;
    }

    friend constexpr bool operator<=(const X &x, const X &y) noexcept
    {
        return x.compara(y) <= 0;
    }

    friend constexpr bool operator>=(const X &x, const X &y) noexcept
    {
        return x.compara(y) >= 0;
    }
};

} // namespace libsim

#endif /* LIBSIM_COMPARABLE_H_INCLUDED */
